Modeling the secondary breakup of a liquid jet in supersonic cross flows

In order to simulate the atomization process in supersonic cross flows,the Eulerian-Lagrangian method was used to demonstrate the gas-liquid two-phase flow phenomena,and four different secondary break-up models were adopted to simulate the process of droplets breaking up. Additionally,the influence of the compressibility of the air,the turbulent fluctuations and the droplets deformation on the droplet movements was considered. The calculation results show that,the TAB model gets the minimum droplet diameter and penetration depth,and is not suitable for the break-up process in supersonic conditions. The droplet sizes determined by the SSD model are relatively uniform. The results of the WAVE and K-H / R-T model are similar. The penetration depth obtained by the K-H / R-T model matched the experimental results better.